蛇麻（学名：Humulus lupulus），又音译作忽布（英语hops），因其花序用于酿造啤酒，因此又称作啤酒花。

多年生缠绕草本，具有小刺钩。叶对生，心状卵圆形，多为三裂，边缘有锯齿，上面粗糙；秋季开小型花，雌雄异株，雄花成圆锥花序，雌花成短穗状花序，每两朵雌花外覆一鳞状苞片；果期苞片增大变薄，互相重叠，合成淡黄白色、卵形的球果状体，每个苞片内藏瘦果两个；瘦果外小苞和花被上布满黄色粉状的香脂腺。

植株

雌花序

雄花序

叶

嫩叶至成叶的发展

毬果

成熟毬果

栽植园

Humulus lupulus (common hop or hop) is a species of flowering plant in the Cannabaceae family, native to Europe, western Asia and North America. It is a dioecious, perennial, herbaceous climbing plant which sends up new shoots in early spring and dies back to a cold-hardy rhizome in autumn. Strictly speaking it is a bine rather than a vine, using its own shoots to act as supports for new growth.